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      11-24-2012, 04:31 PM   #19
Saintor
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Drives: E90
Join Date: Sep 2005
Location: MTL, Canada

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On a 2006 or 335i, I would change it preventively. The water pump design was changed IIRC. Also heat seems to be a contributing factor in the case of the 335i.

I wouldn't do it on a 2007+ N52. I hope not to regret it! I check monthly my codes...